There is an alternate ending to the finale episode "Mirror Image". In the alternate version, the screen does not fade out in the middle of the Leap of Al's young picture. Instead, the Leap completes showing a picture of an older Al. The camera pulls back to show the picture is a family portrait with his wife, Beth, and his four daughters. This version is not for sale by Universal. It was never supposed to leave the editing rooms, but somehow it got out. The only copies available are bootleg copies.
The prologue sequence, narrated by series writer Deborah Pratt, was first used in the series' second season. This prologue sequence, altered in the beginning of season 4 to feature the exterior scene of Project Quantum Leap and its interior, replaced the original prologue from the show's spring 1989 episode, narrated by Scott Bakula, in syndication repeats.
When the show first aired on NBC there was a longer opening narration than what is heard in syndicated reruns. The network version ran three and a half minutes. The syndicated version runs just under two.
The show has a variety of saga sells (opening narrations) and opening credits. In terms of opening credits and saga sells, there are:
- 1. the pilot opening (no saga sell; just a sequence shown of flying through clouds)
- 2. the season one opening (Sam discusses the events of the previous episode)
- 3. the season two through four opening (the saga opening credits as used in syndicated airings of the show)
- 4. the season five opening (the same opening credits as seasons two through four, but with a new rendition of the theme song)
- 5. the final episode opening (the opening credits from season five, but with the original rendition of the theme song)
- The saga sell variations:
- 1. narrated by Lance LeGault, starting with ANOTHER MOTHER
- 2. narrated by Deborah Pratt, starting with ALL AMERICANS
- 3. narrated by Deborah Pratt (with a Ziggy-esque computerized echo effect added to her voice), starting with HER CHARM
- 4. the syndicated version (Deborah Pratt narrated)